© 2010 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other AT&T marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other marks contained herein are the property of their respective owners. Advanced Technical Support May 3, 2011

© 2010 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other AT&T marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other marks contained herein are the property of their respective owners. John Medamana Vice-President Advanced Technical Support IP/MPLS backbones in the US and most of the world to create a seamless global infrastructure for all IP-network- based services. IP edge routers and infrastructure for enabling IP services, including VPN, INTERNET, DSL, Mobility, U- Verse, and VoIP. Metro and WAN Ethernet infrastructures. IP related services provisioning support. Legacy IP/MPLS networks. Layer 1 Transport Rick Lyon ATS Services Taso Devetzis Executive Director Layer 3 Global IP Jim Zatloukal Executive Director Global Layer 2 and Broadband Aggregation Networks Mike Pepe Executive Director Global Layer 1 Transport, Switching, ISDN, E911, DATEC, Power, & Sync Rick Lyon Executive Director Vendor Mgmt, Reliability Engr. & GSAT Ethelyn Lusain Executive Director Global L2 Frame & ATM networks, Ethernet to the Cell Site and Broadband Access Aggregation including DSL. Maintenance engineering support, performing reliability audits and partnering with other organizations to ensure network reliability for global Layer 2/3 and Access Aggregation networks. Mobility Switching, VMS, RAN/UTRAN, E911, and Microwave networks and elements. Mobility Software Quality Assurance Element Audits and Proactive Analysis. Video Services, U- verse/CVoIP Service Path, U- verse NTI, including packaging and automation, chronics, Tier 3 and PSK testing. VoIP/ Network Services – BVoIP, CVoIP, Mobility & LTE VoIP, DNS, DHCP, RADIUS, LDAP, NTP. Mobility/LTE applications, E2E services, quality monitoring for video, VoIP, Mobility (LTE) and hardware diagnostics. Management of GNO Maintenance Expense program, Vendor Mgt and development of reliability engr. best practices. AIN and SS7 platforms, tools, as well as providing Element Management System (EMS) and access support for Layer 1, 2, and 3 elements, Global Service Applications and Technology (GSAT). Production and analysis of metrics vendor scorecards, and dashboards. DC power, power generation, and power alarms. Technical support for maintenance, provisioning, service assurance/reliability of the transport, switching, and Mobility networks, and specialized support for AFN, E911 and ISDN. Maintenance, and service assurance /reliability for all PRS and TSG network timing systems. Vendor management/ vendor network reliability. Mobility Switching, VMS, RAN/UTRAN, E911 & Microwave Glenn Shull Executive Director 2

© 2010 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other AT&T marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other marks contained herein are the property of their respective owners. Layer 1 Transport Rick Lyon 3 Executive Director Global Layer 1 Advanced Technical Support Global Layer 1 Wireline & Mobility Transport ESAC Mike Gaines Director SONET/DWDM/DCS and Transport products. Vendor management /vendor network reliability. Project management of the AFN Network retirement by 6/30/11. Tier 3 technical support for E911. Global Layer 1 Wireline and Mobility Transport & Switching Field Technical Support & DATEC Marla Spielman Director Tier 3 field technical support for Layer 1 Transport, Switching, Mobility, AFN, and ISDN. Certification of critical installations, reliability audits for central offices and MTSOs, FOAs, and FFAs. Global DATEC support, including layer 1, 2, and 3. Tier 3 technical support for the GSA maintenance organization. Onsite support for hardware and software upgrades. Global Layer 1 Wireline & Mobility Central Office Power Technical Support Carol Will Director Tier 3 remote and field power technical support for Wireline, Mobility, IDCs and CRE. Certification for all new power installations. Performing power audits to ensure network reliability. Performing RCAs for power and grounding related network outages. Providing portable power generation for emergencies as well as long term support. Global Layer 1 Wireline & Mobility Network Timing & Synchronization Rick Brown Area Manager Tier 3 technical support for all synchronization elements within AT&T’s wireline core network and Mobility. This includes providing 7X24 critical network event restoration support. Providing on-site and remote Sync Conversion Project Management. Provide remote and on- site support for test and acceptance, maintenance, and service assurance and reliability.

© 2010 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other AT&T marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other marks contained herein are the property of their respective owners. Layer 1 Transport Rick Lyon 4 Mike Pepe Executive Director ATS Global Layer 2 & Broadband Aggregation Networks ATS Global Layer 2/3 Technical Support Jeff Hall Principal Member of Tech Staff Provide technical support to Layer 2 Tier 3 organization. Support EDRD/DG/MOP development for MSN and SIAD. Support tool development. ATS Global Layer 2/3 Field Technical Support David Sporer Director Tier 3 field SME and technical support for all Layer 2/3 network elements and office infrastructure for AT&T's domestic networks. Certification for all premium element installations within the networks. Build, configure, jumpstart, patch and deploy network servers and appliances. ATS Global Layer 2 and Access Aggregation Networks Bob Ferraris Director Tier 3 technical support for AT&T ATM/FR, DSL and Access Aggregation networks. Tier 3 technical support for all Mobility MSN, SIAD and EMUX devices.

© 2010 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other AT&T marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other marks contained herein are the property of their respective owners. ATS Certification 5

© 2010 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other AT&T marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other marks contained herein are the property of their respective owners. ATS Certification 6 What is certification? Certification is an inspection performed on a critical network element installation to ensure that AT&T installation and turn up practices and guidelines are followed by the Installation Vendor. Who does the certification? ATS Field personnel in the Transport Layer 1-3, Synchronization and Power groups perform certification on critical platforms that they support. When is certification done? Certification is generally performed during the test and turn up phase of the installation process. Dates are established with the Installation Vendor to meet on site in order to capture any defects that may be corrected immediately so ready for service dates are not jeopardized. What do we do with the results? Certification findings are entered into the AT&T Remedy database in order to track installation defects by vendor and equipment. Results are shared with Engineering and the Vendor in order to help eliminate similar errors on subsequent installations.

© 2010 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other AT&T marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other marks contained herein are the property of their respective owners. ATS Certification Checklist Categories 7 Equipment Cooling Fans Power Timing Cabling Grounding Ironwork Equipment Designation Documentation Software Validation Reliability Testing Alarm Verification

© 2010 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other AT&T marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other marks contained herein are the property of their respective owners. ATS Certification Platforms Layer 1, 2, 3, and Power 8 Emerging TechnologiesCritical ElementsPower New Technology Introduction (NTI) – FOA/FCA IPAG (Juniper MX480, MX960, WIPM) VPLS-PE (Juniper T640, WIPM) ATM Switch ESS – ALU 7670 RSP (Mobility) VOIP Platforms (BVOIP, CVOIP e.g. OSR) Lightspeed (ALU7450, 7750, 7330 IP DSLAM) Ciena NTE Adtran TA5000 EOC Next Gen BITS Clocks Nortel OME6500 ICDS Major Build (Dell/HP/Foundry/Sun Server) CALEA (Cisco 6504-E), SIMS Cisco CRS-1 Router (Core, Remote Aggregation and Multi-Chassis) GSR (Cisco 12xxx Series) Router SONUS (Mobility), Cisco 7609 (Mobility) MSC Tellabs 8860 (Mobility) GigaScope (Mobility/Broadband) Tellabs 532, 5320L, 5500, NGX-S Telmar 1630 GSX, 1631 SMC, 1633 SX, 1680 OGX, DEXCS 1/S/L/VL, ECS1 Alcatel 1631, 1671, 1677 Lucent DACS II, III, IV Ciena Core Director Nokia Siemens HIT 7500 ULH (40G) DWDM Nortel OME6500 FEI US5G Symmetricom TC4500, TH5 All Primary DC Power

© 2010 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other AT&T marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other marks contained herein are the property of their respective owners. ATS Certifications 9 1Q2011 Total Certifications performed: 737 Certifications with deviations vs. no deviations Total deviations: 1076 Major vs. minor deviations

© 2010 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other AT&T marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other marks contained herein are the property of their respective owners. 1Q2011 ATS Certifications Total Deviations: Cables are outside the cable trough. Extra cable length is coiled at the top of the bay blocking equipment. Cable ties were never cut. Cables improperly run across the equipment, blocking access.

© 2010 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other AT&T marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other marks contained herein are the property of their respective owners. 11 1Q2011 ATS Certifications Total Equipment Designation Deviations: 376 Labels are ripped and illegible. New labels are required.

© 2010 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other AT&T marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other marks contained herein are the property of their respective owners. 12 1Q2011 ATS Certifications Total Cabling Deviations: 205 Improper routing

© 2010 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other AT&T marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other marks contained herein are the property of their respective owners. 13 1Q2011 ATS Certifications Total Power Deviations: 169 Exposed electrical wires

© 2010 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other AT&T marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other marks contained herein are the property of their respective owners. 14 1Q2011 ATS Certifications Total Equipment Deviations: 157 Missing hardware

© 2010 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other AT&T marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other marks contained herein are the property of their respective owners. 15 1Q2011 ATS Certifications Total Grounding Deviations: 77 Ground cable run incorrectly. Incorrect cable length and improper dressing causing congestion.

© 2010 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other AT&T marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other marks contained herein are the property of their respective owners. 16 Theto our success together is – Attention to detail Compliance with standards Mutual cooperation